Bearing for disk harrows and the like



H. M. JOHIJSTON ETAL M 2,294,234

BEARING FOR DISK HARROWS AND THE LIKE Filed July 5, 1940 2 Sheets-Sheet l 25, 1942- H. M. JOHNSTON ETAL 2,294,234

BEARING FOR DISK HARROWS AND THE LIKE Filed July 5, 1940 2 Sheets-Sheet 2 Hon/A20 MJo/ms ro/y Patented Aug. 25, 1942 BEARING FOR DISK HARROWS AND THE LIKE Howard M. Johnston and Peder Bjerre, Toronto, Ontario, Canada, assignors to Massey-Harris Company Ltd., Toronto, Ontario, Canada, a

company of Canada Application July 5, 1940, Serial No. 344,040

3 Claims.

The present invention relates to bearings particularly adapted for use on disk harrow gangs wherein the gangs are formed by means of a shaft, spaced disks and sleeves therebetween and wherein the bearings are positioned between certain disks and acting as the sleeve between these disks.

Bearings of the class are diificult to design because their frictional surfaces cannot be protected ai st more Or less abuse and dirt and because they cannot be supported in a perfectly rigid structure and in alignment with each other. However, bearings of the class must be strong, capable of operating under the most difficult conditions, having long life, and capable of being manufactured at low cost.

Another difficulty in designing bearings of the class is that the wearing surface must be made from gray iron and chilled; therefore, ma-

chining of the hardened parts must be dispensed with.

We provide a bearing wherein the sleeves of the bearing act as spacing means between the disks and wherein the parts are easily manufactured and assembled and wherein the friction surfaces may be conveniently and efficiently chilled, thus to add greatly to the wearing qualities of the bearing under all conditions of service and provide a bearing which can be manufactured at low cost, easily assembledan'd replaced.

To these and other useful ends, our invention consists of parts, combinations of parts, or their equivalents, and mode of operation, as hereinafter set forth and claimed and shown in th accompanying drawings in which:

Fig. 1 is a longitudinally sectioned view of our improved bearing illustrating fractionally parts of the axle, disks and axle sleeves.

Fig. 2 is an end View of the bearing illustrated in Figure 1 taken on line 2-2 of Figure 1.

Fig. 3 is a fractional assembly view of a disk gang, illustrating one of the frame bearings and a spacer sleeve in position between the disks.

Fig. 4 is a top view of the lower half of the- As thus illustrated, we designate the axle of the gang by reference character A. The separating sleeves are designated by reference character B. The disks are designated by reference character C and the bearing sleeves are designated, in their entirety, by reference character D.

As illustrated in Figure 3, a number of disks and sleeves are positioned on axle A. At certain intervals, sleeve B is dispensed with and the bearing sleeve, as shown in Figure l, is substituted.

It is the custom to provide axle A with a head, at one end, and a washer and screw threaded nut at the other end (see Figure 3) so the entire assembly may be held tightly together. Axle A is preferably square in cross section (see Figure 2).

Sleeves b are provided with enlarged annular surfaces suitable for contact with the disks. The bearing sleeves, at their ends, are designed exactly like the ends of sleeves B. These bearing sleeves consist of two axle sleeves l0-I0 each being provided with flanges I III which abut.

The bearing surface of the sleeves consists of the flange surfaces as at I2 and the circular extensions as at I3, the extensions being slightly tapered outwardly toward their ends and having projections I4 on which are mounted collars I5 Thus, when the two sleeves and two collars are assembled, as illustrated in Figure 1, they will act similar to sleeves B as spacing means for the adjacent disks. It is contemplated that projections I4 may be machined true with surfaces I3 and in concentric alignment with the square openings in the sleeves. It will be understood that these square opening are adapted to slidably embrace the axle. Collars I5 may be machined true Where they fit over members I4 and against the rear shoulder thereof. Thus, when the nut on the end of the axle is made taut, the bearing sleeves and disks will be held true with the axle.

In medium length gangs, it is the custom to provide two frame bearings for each gang. In longer gangs, more bearings may be supplied.

We provide a bearing housing consisting of a lower cap I6 and an upper member II. Members I6 and I! are adapted to receive two sleeves I8I8 as illustrated in Figures 1 and 2. The sleeves are held tightly between the housing members by means of bolts I9I9. Housing sleeves I8 are slightly tapered to correspond with the exterior of bearing sleeves I0 so that when the bearing caps are made taut, the sleeves will turn freely on the axle collars and flanges II will secured, the post forming a connection between.

the bearing and the gang frame as. is the custom in harrows of the type.

Some disk gangs are not supplied with frames but all must have the draft links. Some are pro.-.

vided with frames to which thedraft links are attached. In either event, my bearing is suitable for the rotating connection between the frame and draft links and the axle.

Surfaces I2 and I3 are chilled, and at least at the inner ends, members l8 and their openings are chilled. Thus, all of the wearing surfaces of the bearing are chilled.

In. Figures 6 and 8, we illustrate the chilled surfaces of members It, and It by means of short closely spaced lines.

In Figure 2, numeral 24 designates a lubricating fitting. Generally this fitting is adapted to receive bearing grease from a grease gun or otherwise.

A screw threaded opening is provided for fitting 24 which extends into a chamber 25. Thus, it will be seen, that grease is supplied to the center of the bearing and that it must gradually work out toward the ends of the bearings between the chilled surfaces. Thus, the; grease will act to move outwardly any foreign matter that may accumulate in the bearing.

Clearly we have provided a simple and efficient axle bearingsleeve consisting of four parts and a housing which. is rotatably mounted on thi sleeve consisting of four parts. 1t will be noted when either members IQ or l8 are worn out-, they may be easily replaced at low cost, and that our invention is simple, light, strong, efficient, easily and cheaply manufactured, and that th wearing parts may be easily and cheaply replaced.

Having thus shown and described our invention, we claim:

1. A disk harrow bearing of the class described comprising a shaft with spaced disks mounted thereon, two sleeves each having a peripheral flange on one end mounted on said shaft midway said disks with the flanges contacting, integral collars mounted on the outer ends of said sleeves having peripherally extended flanges adapted to contact the adjacent surfaces of the disks, means on said shaft to tightly bind said disks, collars, and sleeves together, annular bearing sleeves mounted on said flanged sleeves on opposite sides of said flanges, a split bearing housing adapted to embrace said annular bearing sleeves and having inwardly turned flanges adapted to contact the outerends of said annular bearing sleeves.

2. A disk harrow bearing of the classdescribed comprising a shaftwith spaced disks mounted thereon, two sleeves. each having a peripheral flange on one end mountedv on said shaft mid- Way'said disks with the flanges contacting, flanged collars mounted between the outer ends of; said sleeves and the disks to thereby form spacing means, means on said shaft to tightly bind said disks, collars, and sleeves together, annular bearing sleeves mounted on said flanged sleeves; on opposite sides of said flanges, a split bearing housing adapted to embrace said annular bearing sleeves and having inwardly turned flanges adapted to contact the outer ends thereof.

3. A device as recited in claim 2 including: the bearing surfaces of said first bearing sleeves being slightly tapered or smaller in diameter towardtheir outer ends.

HOWARD M. JOHNSTQNEQ PEDER BJERRE. 

